Correlation between SPAD Value and nitrogen indicators in rice leaves at different growth stages

doi:10.14088/j.cnki.issn0439-8114.2020.17.004

Abstract

Abstract: In order to clarify the correlation between the average SPAD value of rice （Oryza sativa L. ） leaves at different growth stages and the nitrogen content, accumulation of aboveground parts under condition of different amount of nitrogen fertilizer, a randomized block cultivation experiment under different nitrogen fertilizer levels was conducted. The results showed that the change trend of SPAD values measured in the upper, middle and lower parts of rice leaves was similar to the average SPAD values, and the SPAD values gradually decreased from tillering stage to yellow maturity stage. During the rice growth cycle, the nitrogen content of rice leaves and stems decreased gradually from tillering stage to yellow maturity stage, and the difference of nitrogen content increased with the increase of nitrogen application. During the whole growth period of rice, the average SPAD value of leaves was positively correlated with nitrogen content of stems and leaves（P < 0.01）. Therefore, the SPAD value of rice leaves can be used as a basis for regulating nitrogen application.

Key words: rice（Oryza sativa L.）, SPAD value, nitrogen content, nitrogen accumulation

CLC Number:

S511

CHEN Qiu-yu, HUANG Ying-hua, ZHANG Hua-jie, ZHOU Li-yan, ZHAO Li-jun, ZHANG Shan-xuan, XIA Li-sha, HONG Rui-xia, LI Yan-da, CHEN Qing-chun. Correlation between SPAD Value and nitrogen indicators in rice leaves at different growth stages[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(17): 19-24.

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